Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2012

Debt Disclosure [Abstract]

Schedule of Debt Instrument, Redemption Price, 6.50% Senior Notes Due 2023 [Table Text Block]

2017	103.250	%
2018	102.167	%
2019	101.083	%
2020 and thereafter	100.000	%